CA6140机床后托架加工工艺编制及夹具设计

本科毕业设计CA6140车床后托架加工工艺及夹具设计学生姓名：齐峰学生学号：080514020510院（系）：机械工程学院年级专业：机械设计制造及自动化指导教师：芦玉梅二〇一二年六I摘要机械加工工艺是规定产品或零件机械加工工艺过程和操作方法，是指导生产的重要的技术性文件。它直接关系到产品的质量、生产率及其加工产品的经济效益，生产规模的大小、工艺水平的高低以及解决各种工艺问题的方法和手段都要通过机械加工工艺来体现，因此工艺规程的编制的好坏是生产该产品的质量的重要保证的重要依据。在编制工艺时须保证其合理性、科学性、完善性。而机床夹具是为了保证产品的质量的同时提高生产的效率、改善工人的劳动强度、降低生产成本而在机床上用以装夹工件的一种装置，其作用是使工件相对于机床或刀具有个正确的位置，并在加工过程中保持这个位置不变。它们的研究对机械工业有着很重要的意义，因此在大批量生产中，常采用专用夹具。关键词:工艺规程；刀具；夹具IIAbstractThemachiningprocessisaregulationproductsorpartsmachiningprocessandoperationmethod,isguidingtheproductionofimportanttechnicaldocuments.Itdirectlyrelatedtothequalityoftheproducts,productivityanditsprocessingproductseconomicbenefits,thesizeoftheproduction,processoflevelandprocessproblemstosolveallthemethodsandmeansofthemachiningtechnologytomanifest,sothestandorfalloftheprocedureforthequalityofitsproductsistheimportantguaranteeoftheimportantbasis.Compilingprocessshouldensurethatitsrationality,scientificandperfectsex.Andmachinetoolistoensurethattheproductofthefixturethequalityatthesametimeimprovetheproductionefficiency,improvethelaborintensity,reduceproductioncostandinthemachinetoolusedtoclampingwork-piece,adevice,anditsfunctionistomaketheworkrelativetothemachineorknifehasacorrectposition,andinthemachiningprocesskeepthispositionunchanged.Theirresearchofmechanicalindustryhasaveryimportantsignificanceinmassproduction,therefore,oftenusespecialjig.Keywords:Procedure;Cuttingtool;FixtureIII目录摘要.....................................................................................................................IAbstract................................................................................................................II第1章绪论........................................................................................................11.1机械加工工艺规程....................................................................................11.2工艺规程制订的原则................................................................................11.3制订工艺规程时的原始资料....................................................................21.4制订工艺规程的步骤................................................................................21.5工艺文件格式............................................................................................31.5.1机械加工工艺过程卡.........................................................................31.5.2机械加工工艺卡片.............................................................................31.5.3机械加工工序卡片.............................................................................31.6夹具设计的基本要求................................................................................4第2章CA6140机床后托架加工工艺编制......................................................52.1CA6140机床后托架的工艺性分析及毛坯的选择..................................52.1.1CA6140机床后托架结构的工艺性...................................................52.1.2CA6140机床后托架的技术要求.......................................................52.1.3CA6140机床后托架毛坯的选择.......................................................62.2加工工艺过程的设计................................................................................62.2.1工艺过程的组成.................................................................................62.2.2定位基准的选择.................................................................................72.2.3加工阶段的划分.................................................................................82.2.4各表面加工方案的确定...................................................................102.2.5工序的集中与分散...........................................................................112.2.6加工工艺路线方案的比较...............................................................122.3加工的工序设计......................................................................................142.3.1毛坯的结构工艺要求.......................................................................142.3.2加工余量及工序尺寸的确定...........................................................142.3.3机床和工艺装备的选择...................................................................17IV2.3.4确定切削用量及基本工时...............................................................182.4时间定额计算及生产安排......................................................................322.4.1粗、精铣底面...................................................................................322.4.2镗侧面三杠孔...................................................................................322.4.3钻顶面四孔.......................................................................................33第3章专用夹具设计......................................................................................353.1铣平面夹具设计......................................................................................353.1.1研究原始资料...................................................................................353.1.2定位基准的选择...............................................................................353.1.3切削力及夹紧分析计算...................................................................353.1.4误差分析与计算...............................................................................373.1.5夹具设计及操作的简要说明.....................